Palavra chave: 即時(shí)(shí)(shí)(shí)通訊_________________________，企業(yè)(yè)(yè)(yè)(yè)(yè)(yè)(yè)溝通__________________，龍笛即時(shí)(shí)(shí)(shí)通_______________，移動(dòng)(dòng)(dòng)(dòng)辦公____________________，集成開(kāi)(kāi)(kāi)發(fā)(fā)(fā)(fā)(fā)(fā)(fā)(fā)